Sorry Everyone, The typo in the command line of our last mail 'Class Library Problem' where it states expres in the command line is a typo in the e-mail. The command line in R did say exprs for both the trainSet and testSet. Sorry about that, Steve. Dr. Stephen Moore Senior Scientist ArraGen Ltd. Almac House Seagoe Industrial Estate Craigavon Co. Armagh BT63 5QD Northern Ireland E-mail:Stephen.Moore@arragen.com Phone: 02838 395751 Mobile: 07719 989348 Fax: 02838 398676 This e-mail is from ArraGen Ltd The e-mail and any files transmitted with it are confidential and privileged and intended solely for the use of the individual or entity to whom they are addressed. Any unauthorised direct or indirect dissemination, distribution or copying of this message and any attachments is strictly prohibited. If you have received the e-mail in error please notify helpdesk@arragen.com or telephone +44 28 38 363841 and delete the e-mail from your system. E-mail and other communications sent to this company may be reviewed or read by persons other than the intended recipient. Viruses : although we have taken steps to ensure that this e-mail and any attachments are free from any virus, you should, in keeping with good practice, ensure that they are actually virus free. ArraGen Ltd. Registration Number NI 43067 Registered Address : Almac House, 20 Seagoe Industrial Estate, Craigavon, BT63 5QD